RRB NTPC CBT-1 previous year question
When a metal spoon is placed in a hot cup of tea, it soon becomes warm. Which mode of heat transfer is primarily responsible for this?
Asked in RRB NTPC 2026 — 18 June Shift 3 · General Awareness
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Correct answer: (B) Conduction
Heat travels from the hot tea through the metal spoon by conduction, in which heat energy is transferred directly through the vibrating particles of the solid metal.
हिंदी में प्रश्न
जब गर्म चाय के कप में धातु की चम्मच रखी जाती है, तो वह जल्द ही गर्म हो जाती है। इसके लिए मुख्य रूप से ऊष्मा अंतरण का कौन-सा माध्यम उत्तरदायी है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) चालन (Conduction)
गर्म चाय से धातु के चम्मच में ऊष्मा चालन द्वारा प्रवाहित होती है, जिसमें ठोस धातु के कंपायमान कणों के माध्यम से ऊष्मा ऊर्जा सीधे स्थानांतरित होती है।
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